https://github.com/lz4/lz4/blob/87a80acbe7872b9da7d56f7005ffd1b715e87c93/lib/lz4hc.c#L1034 may trigger a UBSan warning if `LZ4_streamHCPtr->internal_donotuse.end` and `LZ4_streamHCPtr->internal_donotuse.base` are already `NULL`.
lz4/lib/lz4hc.c
Line 1034 in 87a80ac
LZ4_streamHCPtr->internal_donotuse.endandLZ4_streamHCPtr->internal_donotuse.baseare alreadyNULL.